Assignee
LYALL R W & CO INC
US·20 granted patents·1 pending application·545 citations·filing 1979–2022
Top patents by PatentIndex Score
21 records- 0195US4635972APlastic pipe coupling apparatus and method of using sameLYALL R W & CO INC·Filed 1985·Granted Jan 13, 1987·134 cites·21 claims
- 0289US4695335AMethod for developing a predetermined fusing temperature in thermoplastic itemsLYALL R W & CO INC·Filed 1985·Granted Sep 22, 1987·63 cites·9 claims
- 0388US4906313AFusion weld method and assembly for forming a fusion welded joint between pipe sectionsLYALL R W & CO INC·Filed 1988·Granted Mar 6, 1990·65 cites·11 claims
- 0480US4718698AApparatus and method of forming fusion welded butt joint between thermoplastic pipe sectionsLYALL R W & CO INC·Filed 1985·Granted Jan 12, 1988·45 cites·5 claims
- 0579US4943706AMethod and apparatus for fusing thermoplastic materialsLYALL R W & CO INC·Filed 1988·Granted Jul 24, 1990·40 cites·11 claims
- 0673US11953134B2Mechanical fitting for a plastic pipe connection and method for making the sameLYALL R W & CO INC·Filed 2022·Granted Apr 9, 2024·0 cites·18 claims
- 0770US7152621B1Integrated gas meters bar device and locking shut-off valveLYALL R W & CO INC·Filed 2003·Granted Dec 26, 2006·14 cites·7 claims
- 0869US5465751AExcess flow valveLYALL R W & CO INC·Filed 1994·Granted Nov 14, 1995·32 cites·22 claims
- 0967US4257452ABiased open direct response valve with damping meansLYALL R W & CO INC·Filed 1979·Granted Mar 24, 1981·22 cites·8 claims
- 1063US11384882B2Mechanical fitting for plastic pipeLYALL R W & CO INC·Filed 2019·Granted Jul 12, 2022·0 cites·18 claims
- 1161US5367756AGas meter riser transition field completion toolLYALL R W & CO INC·Filed 1993·Granted Nov 29, 1994·23 cites·16 claims
- 1259US5437300AApparatus for changing out gas metersLYALL R W & CO INC·Filed 1994·Granted Aug 1, 1995·22 cites·12 claims
- 1358US4243254ASlip fit type tubing couplingLYALL R W & CO INC·Filed 1979·Granted Jan 6, 1981·21 cites·13 claims
- 1456US11959578B1Vertical pig launcher and method of using sameLYALL R W & CO INC·Filed 2022·Granted Apr 16, 2024·0 cites·10 claims
- 1556US7360554B2Integrated gas meter bar device and locking shut-off valveLYALL R W & CO INC·Filed 2006·Granted Apr 22, 2008·3 cites·6 claims
- 1654US5482073AMethod of changing out gas metersLYALL R W & CO INC·Filed 1995·Granted Jan 9, 1996·23 cites·12 claims
- 1742US11428360B1Vertical pig launcher and method of using sameLYALL R W & CO INC·Filed 2014·Granted Aug 30, 2022·0 cites·8 claims
- 1842US2008012289A1Mechanical repair fitting for polyethylene pipesLYALL R W & CO INC·Filed 2005·Application pending·0 cites
- 1941US5501331AGas service line completion kit and method of fabrication and installationLYALL R W & CO INC·Filed 1994·Granted Mar 26, 1996·17 cites·27 claims
- 2038US5689938AMethod of fabricating and installing gas service line completion kitLYALL R W & CO INC·Filed 1995·Granted Nov 25, 1997·14 cites·23 claims
- 2121US5971003AApparatus to service gas metersLYALL R W & CO INC·Filed 1998·Granted Oct 26, 1999·7 cites·17 claims
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